Universal joint.



F. E. BOGORSELSKI.

UNIVERSAL JOINT.

APPLICATION FILED AUG. 4, 1910.

I 1,020,476. Patented Mar. 19, 1912.

1 7;- W C T "i LVVENTOR, j/ [1/ g fiamiffiawmeZs/i' BY 3 I A'ITIORNEY. I

' UNITED STATES PATENT OFFICE.

FRANK E. BOCORSELSKI, or SPIDR'IINGFIELD, MAssAQHUsE'nTs.

UNIVERSAL J OIN 'I'.

i To all whom it may concern chu s'etts, have invented certain new and useful Improvements in Universal Joints, of ,which the following is a full, clear, and ex- Y act description.

This'nvention relates to universal joints for'coupling the ends of a pair of cooperative unalined shafts, and it hasfor one of -its objects the provision of a. device of this character in which a..minimu1nnu mber of parts are employed and which is adapted to transmit a proportionally great amount of power. v c -The lnventlon has, furthermore, for its object such construction of the device,above referred to, whereby the life thereof will be substantially doubled by virtue of the fact that the parts most exposed to wear may be reversed so that after one side thereof has been worn, the other side may be brought in conjunction with its cooperative element.

Further objects of the invention will here inafter appear and the means of their attainment be pointedout in the claims.

Referring to the drawings in which similar characters denote similar parts Figure 1 is a side View of a universal joint embodying my invention. Fig. 2 is a vertical'section thereof on line 2, 2 of Fig. 1. Fig.3 is a horizontal section on line 3, of Fig. 1. Fig. 4 shows a perspective view of the principal pivot-pin of the device. Fig. 5 shows a. perspective view of one of the trunnions cooperative with and united to said pivot pin, and Fig. (3 illustrates the universal joint in its unalined or broken position.

Referring to the drawings, the n'umerals 10 and 11 denote a pair of coupling members which are bored out as at 12 and 13 to receive the ends of shafts which the joint is intended to unite.

The coupling members or shaft sections 10 and 11 are substantially similar each having its ends bifurcatedand comprising pairs of arms 14 and 15, respectively, adapted to straddle each other at right angles and'to thet transmissioz'r receive between them block as such member is usually termed in this class of devices. This member consists in the present instance of a block 16 of such size as to tit closely between the jaw pairs- 14 and al o between the jaw pairs 15 (see Specification of Letters Patent. Application filed August 4, 1910. Serial no. 575,478.

Patented Mar. 19, 1912.

Fig. 3), and it carries the devices whereby these jaw -sections may be supported for turiiing or pivot movement so as to adapt themselves to tions.

In the present instance, the pivot nienibers for the-jaw, respectively, consist of a pivot pin 17 extending throughthe block 16 at opposite sides thereof far enough so as to be engaged by the jaws15 which, however, are in engagement or surface cont'act with said pin only for substantially one-half ofthe peripheral surface thereof, as clearly indicated in Figs. 1,3 and 6. a

' 'Means are provided for connecting the' pivot pin 17 with the bloek' 16 in such mannor that it may be a-djustably turned for; half a rotation, and at the same' time. preventing said pin from longitudinal movethe rotations of the shaft secment therein, these means consisting of trunnion forming blocks 20, 21 constructed alike and substantially as shown .in Fig. 5," and adapted to form-a rigid joint with the pivot pin 17,- as shown in. Fig. 3, in which it having cutaway portions near its lon itudinal center and at diametrically opposite sides so as to form recesses 22 bounded by Straight. walls 23, 24 disposed at proper distance apart to receive between them the correspondingly shaped or tenon like ends25 of the trunnions :20 and 21, said reduced portions being bounded by a pair of parallel faces 26 and 27 (see Fig. 5), so that the trunnion blocks 20. 21. may be assembled in connection with the pivot pin'l7, either side up. and when thus assembled, said trunnion blocks are firmly drawn to gether and into their respective recesses in the pivot pin 17 by means of a screw 28 (see Fig. 3). i The screw has a head within a countersink in the bore of the trunnion'block 21', av portion of its shank loosely passing through the bore in such block, While its screw extremity screw-engages in'the tapped bore in the opposite trunnion block 20.

From the foregoing, itwill be understood that the trunnion blocks are, as av matter of far-t. reyersible, so-thatwhen the one-half periphery of the trunnion 21 shall have been worn by virtue of its contact with the jaw 14, to some appreciable extent, the trunnion 21 itself may at first be pulled out. of its recess in the pivot-pin 17 and then turned half way around so as to bring the new sur- 80 will be seen that the pivot pin 17 is slabbed face a thereof into engagement with the jaw pied by the surface n shown n Fig. 1. It

Vreversibility, the life of the universal joint bythe outwardly projecting ends of the tion when the shaft sections are reversely 14, while the opposite worn surface of said trunnion will then occupy the position occuis, therefore, evident that by virtue of this as a whole and as far as it depends upon the trunnions, will be doubled, as compared pith the older types of devices used heretoore.

By reason 'of the interengagement of the several arts, that is the inner faces of the jaws of the shaft sections with opposite sides of the transmission block and the oppositely-opening recessed portions of pairs of the jaws with the trunnions constituted pivot pin and of the trunnionblocks, this universal joint is as stable in the main-. tained relation of its parts and forl power transmission without back lash or lost morotated as it is when the sections are forwardly rotated.

I claim A universal joint comprisiilg shaft secthereinto oppositely disposed, a transmission block, the sides of which are atright angles to each other being embraced by both pair of said jaws, and having bores ex opposite recesses in the middle portion thereof which is within the transmission block, a air of trunnion blocks which the other pair of partially circularly recessed jaws engage, entered intothe other bore of the transmission block, and having tenon like projections at their inner ends, in engagement in the said opposite recesses in the'middleof the pivot in, and a headed screw, the shank of whlch is loosely extended through one of the trunnion blocks, and has a screw engagement with the other trunnion block.

Signed by me at Springfield, Mass, in

tions, each having a pair of opposed jaws, ,presence of two subscribin witnesses.

those of one section being arranged at right angles to those of the other, and the jaws of each pair having partially circular trunnion receiving sockets, with the openings I FRANK E. BO ORSELSKI. Witnesses:

' WM. S. Bnnnows, H. L. SPRAGUE. 

